Tractor wheel and driving means



Patented Oct. 31., 1922,

I/vvf/vro/ .Pfiff/r E. Gun/ms. /irro/wvfr,

P`. E. GUTHRIE.

TRACTOR WHEEL AND DRIVING MEANS.

APPLICATION FILED APR. I9. 1921.

Patented @et 81, 1922.

Ulli SWTVS PETER E. GUTHRIE, OF MORRSTO'WN, SOUTH DAKOTA.

TRACTOR NHEEL AND DRIVING TKEANS.

Application led April 19, 1921.

To all whom t may concern.'

Be it known that l, PETER E. G-UTHRIE, a citizen` of the United States,residing at Mord ristown, in the county of Corson and State of SouthDakota, have invented certain new and useful Improvements in rlra-ctorll7heels and Driving Means; and 1 do hereby de-- clare the following tobe a full, clear, and exact (ilescription of the invention, such as willenable others skilled inthe art to which it appertains to make and usethe same.

This invention relates to a tractor wheel and the drivingmeans for thesame.`

It isan object of this invention to provide a wheel having radialmembers therein which can be projected through the same to form drivingcleats or `projections to enwith the ground` lt is another object of theinvention to providesuch means and means disposed at one side of thewheel for engaging the projected ends of the same to drive the wheel.

It is still another object of the invention to provide the radiallyprojecting members and an adjustable means for projecting` the same sothat they may be projected more or less at different points about thewheel.

These and other objects and advantages of invention will. appear fromthe following description made in connection with the accompanyingdrawings in which like reference characters refer to the same partsthroughout the different views and in which- Fig. 1 is a view in sideelevation of the wheel and driving means for the same;

Fig. 2 is a vertical section taken on the line 2-2 of Fig. 1 looking inthe direction of the arrows; and

Fig. 3 is a fragmentary view of the driving means as seen from the rightof Fig. 1.

Referring to the drawings, the device coniprises a shaft 1 upon whichthe wheel is mounted. which. shaft is shown as of square or angularformation. On this shaft are disposed two members 2 and 8. The member 2has a cylindrical sleeve portion 2a suitably apertured to receive andfit on the shaft 1 and this member is formed at the endvwith aneccentric elliptical head having a groove 2b formed on its inner side.The member 3 is formed similarly to the enlarged part of the member 2.being also apertured to receive the shaft 1 and having its peripheryelliptical but eccentrically disposed in relation to the shaft. Thismember is also pro- Serial No. 462,658.

vided with a rectangular groove on its inner side. The members 2 and 3have a central cylindrical boss at their outer portions arrangedconcentric-ally to the shaft 2 and cup-shaped members el lit about thesebosses and have their flange portions fitting over the grooves 2 and 3*,these members being bolted to the members 2 and 3 by spaced screwssurounding the central bosses thereon. It will thus be observed that thebottom of the grooves on the members 2 and 3 and the flanges of themembers et form an eccentric cam path about the shaft. 17 as` clearlyseen in Fig. 1. The members 2 and 3 are held in position in the shaft 1by collars 5 secured adjacent thereto by pins G which pass through thesame and the said shaft.

The wheel 7 comprises a hub portion 7 disposed about the sleeve 2a and arim portion 7b. Spaced flat members S having their ends out-turned toform attaching 'flanges are bolted or riveted to the inside of the rimand the said hub member. These members 8 constitute spaced radial spokesand fiat bars 9 are disposed therebetween and adapted to project attheir `outer ends through rectan gular slots formed in the member 7. :ittheir inner ends the members 9 have laterally extending arms or shaftsformed with reduced journals at their ends on which are carried camrollers 10, which cam rollers are disw posed in the cam path heretoforedescribed, `which is formed by the members 2, 3 and et. The shaft 1 isprovided at one side of the wheel with a worm wheel 11 suitablyapertured to fit thereon and a worm and worm shaft 12 are mounted insmall brackets 13 secured to the frame 14 of the tractor. rllhe wormshaft 12 is `provided with a hand crank 15 by which the same may beturned to turn the wormv wheel 11, the shaft 1 and the members 2 and 3,thus turning the eccentrics 2 and 3 in relation to the wheel 7.

A driving shaft 16 is suitably supported in the frame of the tractor anda pair of sprocket wheels 1T are secured thereto in spaced relation andin alinement with a similar` pair of sprocket wheels 1S secured to acounteii'shaft 19 which is supported in suitable brackets 20 alsosecured to the frame 1a of the tractor. The sprocket wheels are attachedto the shafts by set screws passing through the hubs thereof and a pairof chains 21 are disposed over the alined pairs of wheels 17 and 1S. Thelinks of these chains are connected by rods 22 forming the link appliedto the shaft 1G the sprocket 1T will move the chains 2l and thelconnecting bars The rollers' 22" will engage successively with themembers 9 and the wheels` T vfill thus be turned and' its hub portion Tturn on the sleeve 2 of the member the Wheel turns about the sleeve Enthe rollers l()` moving in the cani path above described will be movedrelatively to the member T and theA hub 7 and members 9 \v`ll beprojected at dilferent distances .outside of the member 7b' at differentpoints about the wheel. As shown; in Fig. l, the widest part of theeccentric is at the bottom of the Wheel and they members 9 arethusprojected: to the greatest extent directly below the Wheel. It willbe observed, however, that by turn ing the crank l5, the position of theeccentric' relatively to the Wheel may be changed so that the maximumprojection of the meinber 9` can be made to occur at any pointthereabout. The members 9 form the frioti'on or driving teeth or cleatsin the Wheel and if the ground is very soft, the eccentric may bedisposed as shown in Fig. l.v There the ground is hard, however, and itis not necessary to have such: long teeth. the eff` centric may beturned so: that the teeth ivill project at the bottom of the Wheel anydesired distance from the minimum shown at the top of the Wheel in Fig.l to themaximum shown at the bottom thereof. lt will alivays benecessary, of course, to drive the Wheel to have the teeth extendedsuiiiciently at the side thereof to be engaged by the bars 22.

The form of the eccentric cam path traveled by rollers l0 is not that ofa regular or true eccentric circle, but of somewhat .irregular camshape.v rilhe' portion thereof. as shown, acting on the rollers tocontrol the teeth or grouters 9 at the period of their contact with therollers beingconcentric With the hub 7a. lith the eccentric in theposition shown in Fig. l the members 9 will thus be projected a uniformdistance during their travel past the chain and rollers 22a.

From the above' description it is seen that applicant has provided asimple consti-uo tion of tractor Wheel and one in which the drivingteeth or cleats are permanently and adjustably carried therein.

The parts of the Wheel are con'iparatirely few and the same can berapidly made and is shown in` will.

quickly assembled. lilhen the wheel is once assembled, it forms acompact and rigid structure having no tendency to become disar langedand requires practically no attention.

ltv will., of course, be understood that various changes may be made inthe form, details and arrangement of the device Without departing fromthe scope of applicants invention, Which, generally stated, consists inthe matter shown and described and. set forth in the appended claims.

lVllhat is claimed is:

fl. it device of the class described having in: combination a ivhcelcomprising a rim portion, radially disposed driving members projectingthrough said rim portion and slidably mounted in said Wheel and havingprojections extending at each side of their inner ends parallel to theaxis of said Wheel, rollers on said projections; and. means forprojecting said. members through .the rim different distances atdifferent parts of the Wheel` as the same is rotatedcomprisingeccentrics at each side of the Wheel having groovesin whichsaid rollers are disposed.

2. A tractor Wheel comprising a rim portion and av cylindrical hubportion, radial spokes comprising spaced members secured to said rimand` hub portions and forming a guideivay therebetween, a shaft aboutWhich said Wheel rotates, and eccentric means carried by said shaft,members slidable inl said guideivays and adapted to project through saidrim and being connected at their inner ends to said eccentrics wherebythe Wheel rotates, the same Will be projected dillierent distancesthrough said rim.

3. tractor structure comprising a wheel support, a Wheel rotatablymounted thereon, a plurality of radial cleat members adapted to beprojected through the rim of said Wheel, means on said Wheel support forprojecting and withdrawing the cleat members, and means engaging theprojected cleat members at one side of the Wheel to turn. the Wheel.

4. A tractor Wheel comprising a huby and rim portion, an angular shaft,a sleeve dis posed on 4said shaft and having' a cylindrical surface onWhich the said hub of the Wheel rotates, said sleeve having eccentricsformed at each end thereof and radially disposed members having theirouter ends projecting through said rim and connected at their inner endsto said eccentrics whereby the same Will be projected through said rimat varying distances as the Wheel is rotated.

A. Wheel' comprising a rim portion, radially disposed cleats j nojectingthrough said rim, square shaft, a member having a flange at each end andhavinga square aperture therethrough disposer` on said shaft. means forholding said member against longitudinal movement on said shaft, a hubi'or; said wheel journaled on said member between the flanges thereof,said flanges comprising means engaging and moving said cleat members.

6. A wheel structure comprising a wheel having a hub and rim, radiallydisposed cleats projecting through said rim, spokes for said wheelcomprising guide-ways for said cleats7 and a member on which the hub ofthe wheel is journaled having means for y moving' said cleat membersinwardly and `fitted on said shaftand having an eccentric flange on oneend, a Wheel having a outwardly in said guide-ways.

7. A device of the class describedv comprising a wheel having a hub anda rim portion, radially disposed cleat members projecting through saidrim, a shaft, a n'rember mounted thereon and carrying the -wheel hub,means on said member comprisingan elliptical eccentric cam for movingsaid cleat members inwardly and outwardly.`

8. A device in the class described comprising a wheel having ar hub andrim7 spokes comprising spaced members connected to said hub andrimcleats slidable between said spaced members and projecting throughsaid rim, and a member on which said hub is journaled having meansengaging said cleat members for projecting the same through the rim.

9. A device of the lclass described having in combina-tion a squareshaft, a member having a square aperture therethrough rim portion and ahub portion journaled on said member, radially disposed cleats slidablymountedin said `wheel to project through said rim, and means on the endsof said cleats envao'ino said eccentric lanOe to O 2': b b

moversaid cleats inwardly and outwardly. In testimony whereof I afiix mysignature.

PETER E. GUTHRIE.

